It has ( one oxygen sensor ) on the 1991 and 1992 Ford Explorers
motorcraft . com just shows ( 1 ) oxygen sensor for all available engines in a 1991 Ford Ranger
they are located on the exhaust manifolds
The oxygen sensor is located on your lower exaust pipe just before the cat underneath the car
The 1991 Cadillac Deville oxygen sensors are located on the firewall and the air cleaner housing. The firewall oxygen sensor will be on the drivers side. The air cleaner oxygen sensor will be on the back of the air cleaner housing.
So what is the question about your 1991 Wrangler horn?
the o2 sensor is located on the exaust manifold
It is located on the bell housing on the driver's side of the vehicle.
oxygen sensor is found on y pipe under the exhaust manifold on 4 point zero six v engines
they are located right at the exhaust manifold
It threads into the exhaust manifold on the back of the engine.
PULL WHOLE TRANSMISSION OUT AND PUT ONE IN . TAKE BOLTS FROM AROUND ENGINE THEN TRANSMISSION MOUNT A SLIDE BACK THERE GOES. TRHANKS!!